Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update

Abstract

A reanalysis of the model for the longitudinal structure function $F_L(x,Q^2)$ at low $x$ and low $Q^2$ was undertaken, in view of the advent of the EIC. The model is based on the photon-gluon fusion mechanism suitably extrapolated to the region of low $Q^2$. It includes the kinematic constraint $F_L\sim Q^4$ as $Q^2\to$ 0 and higher twist contribution which vanishes as $Q^2\to \infty$. Revised model was critically updated and compared to the presently available data.

arXiv comment20 pages, 8 figures

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Cited by in corpus (3)

• Unintegrated gluon distributions from the color dipole cross section in the BGK saturation model
• Asymptotic gluon density within the color dipole picture in the light of HERA high-precision data
• Higher twists effects in DIS on nuclei at the EIC and LHeC: A phenomenological analysis